package com.abner.juc;

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 *题目：三个售票员   卖出   30张票
 * 多线程编程的企业级套路+模板
 * 1.在高内聚低耦合的前提下，线程    操作(对外暴露的调用方法)     资源类
 * @author Abner
 */

public class SaleTicket {
    public static void main(String[] args) {
        Ticket ticket = new Ticket();
        new Thread(() -> {for (int i = 0;i < 35; i++) ticket.saleTicket();},"A").start();
        new Thread(() -> {for (int i = 0;i < 35; i++) ticket.saleTicket();},"B").start();
        new Thread(() -> {for (int i = 0;i < 35; i++) ticket.saleTicket();},"C").start();
    }
}

class Ticket {

    private int num = 30;
    Lock lock  = new ReentrantLock();

    public void saleTicket() {
        lock.lock();
        try {
            if(num > 0) {
                System.out.println(Thread.currentThread().getName()+"\t卖出第"+(num--)+"张票,\t还剩下:"+num+"张票");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }
    }
}
